On Thu, Jan 17, 2019 at 11:43:49AM +0000, Julien Grall wrote: > Looking at the change for arm64, you will always call dma-direct API. In > previous Linux version, xen-swiotlb will call dev->archdata.dev_dma_ops (a > copy of dev->dma_ops before setting Xen DMA ops) if not NULL. Does it mean > we expect dev->dma_ops to always be NULL and hence using dma-direct API?
The way I understood the code from inspecting it and sking the maintainers a few askings is that for DOM0 we always use xen-swiotlb as the actual dma_map_ops, but then use the functions in page-coherent.h only to deal with cache maintainance, so it should be safe. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
